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Exploring Computing Devices
Exploring Pocket Calculators
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20 centimeters high abacus took Analytical Engine answers Babbage's bird house Bitter and Thomas bones bottom ruler Brand Y costs build a bird calculating devices calculator Multiply Calculator prints numbers calculator will print Calculators show CE/C key cells centi checkbook convert metric units count the number Courtesy customary units diagonal lines display electronic desk calculators Enter equal key Exploring with Pocket fingers four-function calculator g Cereal Gary G Going from right Hewlett-Packard index rod integrated circuit key erases kilogram lators Leibnitz let-s mathematician Melissa and Jacque meter rulers Metos multiply numbers Napiers National Semiconductor number rule original number Pascal's machine pebbles Place rods Pocket Calculators Exploring pre-programmed calculator Push equal Push the clear push the equal reckoning machine right to left slide rule solve Special Functions special keys square root strip sums and differences swer Thomas H top ruler Truman Henry UNIVERSITY OF MICHIGAN-DEARBORN weight zero